Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
The Department of the Interior’s (DOI) lands, waters, and facilities that it manages are vulnerable to biological invasions and can in turn be pathways and sources for invasive species introductions to both public and private land. Species such as cheatgrass, quagga and zebra mussels, Asian carp, Burmese python, and many other invasive species have far-reaching impacts on DOI’s diverse mission—from securing water delivery and conserving native biodiversity to protecting cultural heritage and supporting sustainable energy development, grazing, and timber harvesting.
Coordination and collaboration across jurisdictions are crucial to a strategic approach to stem the spread of invasive species. To that end, the Office of Policy Analysis (PPA) coordinates invasive species policy, planning, and program activities that cross Interior’s Bureaus and Offices. PPA leads Department-wide invasive species strategies, facilitates the development and implementation of Department invasive species action plans, and coordinates the Department’s Invasive Species Task Force, a leadership body comprised of Bureau and Office representatives. Examples of focus areas include invasive species policy; preparedness and response; economic impact analyses; database interoperability; performance indicators; joint budget proposals; and communications.